Friction reverse attachment



w. J. EDWARDS 1,787,571 FRICTION REVERSE ATIACHMEN1 Jan. 6, 1931.

Fild Aug. 25, 1928 1 n. INH

' INV EN TOR.

A TTORNE Y.

Patented Jan. 6, 1931 lign-87,5711

AT' f WILLIAM J. EDWARDS, or WICHITA' rAijits,r TEXAS, Assieivon vTo CLARK MACHINE v icoMPANYfor, WICHITA FALLS, .fiiiXA-S.v

Application led August 23, 1928.r Serial Nc.'3011,'664.

This invention relates to oiliield machinery, especially combination well drilling and clean-out machines, and the invention refers particularly to an improved friction vrei-erse attachment for such machines, the

position, and between the said friction pulley and casing drinn in another position, the alternate positions thereof being Aobtained through a single operating` lever.

Still another object of the invention resides in the provision of a double lever arrangement. by which the rotative action of the said drums may be controlled either individually or in unison.

With the foregoing objects as paramount, the invention has especial reference to its salient features of constructionand arrangement of parts to become manifest as the description proceeds, taken in connection with the accompanying drawings wherein z- Figure l represents a side elevational view of a combination well drilling and cleanout machine showing the invention Vin* operative position thereon.

Figure 2 is a fragmentary plan view of the machine and the invention. 4

Figure 3 is a detail view of a modified form of the invention, showing its adaptibility in controlling the movements of both the drums.

Figure i is a. detail view of one of the pulleys by which the rotative motion of the friction drive is transferred to the drum wheels.

The machine for which the invention has been designed, being of conventional and well known manufacture in its art, no detailed eX- planation is. considered necessary inorder-to demonstrate the relative association between its partsL and!y the invention. Consequently, only those parts.directly'affected by the operation of the invention willv berreferred to liereinafterfand identified by characters vof reference. 1 7

Accordingly, l designates the vframe of the machine upon whichiszarranged the vlarge bandwheel 2,6opeiating the walking beam 3 through pitmaii t inthe `conventional manner. A folding inastt is'showiiat `the left in 'Figure1,.a1portion1 of which -is' broken away as apparent. i

Arranged upon .the lframe l inpaiallelre'- latio'nship are the casing drum anddrilling drunrshafts p6 .and .7 .respective'ly, upon whichthe drums 8 and 9 are mounte'd,shown only in Figure 2. i

y intermediate fthe kdrum shafts 6 and-7 is arranged the common drive -shaift 10,'.carryingjpinions ll .and l2 which enmesh vthe gears 13 vand 14 carried'by di'ums 8 and 9 respectively. -The position of the Apinions 11 and l2 shownin Figure V2 isthe neutral position, being in engagement with neithei' of Vthe gears 13 and .14, it being understood thatthey may `be lmoved longitudinally onl the drive Shaft l0 to effect alternate engagement between'the vpinions and gearsiii imparting rotative motion to either vof the.

drums 8 and-9.` v n Suitable 1 leverv connections are established between the pinions l1 and 12 .and the operators position at the machine, and since these connections form no part of the invention,`tliey have not been illustrated.

Atthe side of the machine frame 1, Aon the end of shaft 10 is arranged a drive chain 15, as also'fapparent in Figure 2,=transmit ting driving power to the shaft 10, from a sourceofvpower (not shown). 1

.From the foregoing, it is apparent that as the drive shaft lOisdriven ina clockwise direction, with pinion 11 operatively engaging large gear V12a/casing drinn 8 will be revolved in an anti-clockwise direction to wind.y or `unwinolthe line thereonin setting up orbreaking out casing. Inf-drilling operations, the pinions are )TOD ` drilling drum 9.'

Referring now especially lto the invention4 shifted on shaft 10 to bring pinion 12 into operative engagement with drilling drum ygear 14, the casingdrum 8 being in the meantime held by the conventional brake band 16.1 Consequently, by so shifting the pinions, driving power is shifted to the and its relationship with,k the above mentioned conventional partsV ofthe machineit may be here statedV that the invention is primarily intended to be used principally on the casing drum 8 forprunning'blocks up and down in setting or vpulling-pipe.

f nism comprising a rockable member loosely Y.mounted onsaid power shaft, a pair of spaced friction rollers carried by said rockrable member, each of said rollers being disposed between the power shaft and one of the drums, and ,means for manually actuating the roclrable member wherebyr each of Y the rollers is moved into and out of operative engagement with the power shaft and its adjacent'drum. f v i In testimonyswhereof I affix my signature.

WILLIAM J. EDWARDS.

On one end of each of the: drum shafts 6 and 7 is mounted'one ofzpulleys 17 and 18 re'- spectively, which are substantiallythe same size, and upon the protruding end of the drive shaft 10, intermediate the` 4pulleys 17 c and 18 is mounted a pulley .19 of aasuitable composition such as paper, to supply maximum friction. This friction pulley,'being fXed'to the shaft 10 of course rotates in the same direction as the shaft 10.

A reversingr mechanism comprising a rockable member 22 is loosely mounted on the power shaft 10 andl has a Ypair of divergent arms whichlatter have rollers 21 jour-V Ynaled thereon, the arms being rigidly connect'edv tothe member 22, thelatter being operated vby a rod 24 which is pivotedeto the member and to a hand'lever 27, mounted upon a shaft 26, whereby upon operation of Vthe lever 27 theroclrable member will be actuated as shown inthe drawings. e v i In practical operation of the invention,- and assuming that the machine isengaged Vin setting up casing, with reference to F igure, as the. casing is lowered into. the well, the line lis unwound-from'the'drum 8 and in raising the blocks and rewinding the line, it is simply required to exert a pull upon the lever 27, causing one of the rollers 21 to engage the drum pulley 17, causing the lftwo shafts- 6 and110 to rotate in the same n direction. Obviously, this arrangement dispenses with the necessity of Vhavingtok reverse' the enginerwhen setting up or vbreaking out caslng, thus prolonging notionlythe usefulness of the engine but also the moving parts of the machine. Y

`The foregoing description applies also to, the control of the drum 9 in drilling operations, in windingand unwinding the line l on the drum when using cable tools.

Manifestly, the construction shown maybe capable of rsome structural alterations to suit varied requirements, and such modifications as may be considered within the scope of the appended claim are also considered the spirit of the invention. f

I claim: c In combination with a Well drilling apparatus having a pair of drums and a power I shaft therebetween, a reversing mechawithin loo 

